Dial test indicator



July 19, 1938. J. w. PARKER DIAL TEST INDICATOR Filed Oct. 18, 1934ATTORNEYS. y

Patented July 19, 1938 UNITED STATES PATENT OFFICE DIAL TEST INDICATORJohn W. Parker, West Barrington, R. I., assigner to Brown & SharpeManufacturing Company, a corporation of Rhode Island Application October18, 1934, Serial No. 748,971 8 Claims. (Cl. 248-124) This inventionrelates to a dial test indicator, Fig. is a perspective View of thebracket which .and has for one of its objects the provision of embracesthe upright standard;

means for securing the movable vertical stand- Fig. 6 is a perspectiveview of the'swivel memard in position, which means is more easilyoperaber which is mounted on the bracket and through 5 ble andaccessible than the securing means which which the gage supporting armextends. 5

have heretofore been provided for such standards. The usual dial test,indicator has its clamping Another object of the invention is theprovision means adjacent its base, thereby preventing the of a securingmeans for the standard, which will bracket which carries the gagesupporting arm permit the gage supporting arm to be lowered from beinglowered close down to the base and 10 closer to the base than hasheretofore been rendering the `clarrlpirlgmeans Very inaccessible 10permitted v especially when this bracket is in close adjacency Anotherobject of the invention is the provision thereto. Further, heretOfOrethe upright Supof a. more efficient and smoother `acting guide for portalthough it may be adjusted along the base, 1 the upright standard thanhas heretofore been is supported in a block sliiable in a groove andprovided, this block which carries the standard slides lalong 15 Anotherobject of the invention is the provithe bOOmOf the gI'OOVe WhichaiiiiOllgh milled, sion of means by which the standard will be slidgives d .lumpy 01 jerky laction, and in Order t0 upon a finished outersurface in its movement imPTOVe D011 this type 0f indicator. Ihave PIO-from one position to another rather than on the Vided a Clamp Which iS`Operable at the Upper unfinished bdttom of a groove so that easierslidend 0f the upright Standard thereby Permitting 20 ing may be had ofthe standard along the base. the bracket to be lowered close to the baseand Another object of the invention is the provi- Positiomng the clampS0 that it Wm be readily sion'of a lighter and yet stronger and morerigid eecessible et au times for easy and fighter ad' standard extendingupwardly from the base. Justment' Furthe?" I support the upnght stand'Another object of the invention is the proviare on the more hlgmyfinished upper surface of 25 Sion of a Standard providing increasedsurface the baseso that easy and even sliding action can for engagementwith the bracket which carries be had along the pase; and the followingis a the gage mounting am. more detailed description of the presentembodi- Another object of the invention is the mmm ment of thisinvention, illustrating the preferred sion of a standard which will bestronger in prcgleans by Tfhcl these advantageous results may 30 eaccomp 1s e 1 ggllccio Welght than standards of prevloue With referenceto the drawing, I0 designates A further object of the invention is theprovile?glclhsdyarglhrslcr th sion of a plurality of entirelyindependent adjusti d t f th r t p an.

3 `ments so that the operator may more nicely ad- '55163 lrc o estrlftlre above 1t' Tels 35 just the position of the gage withoutexercising grasping the Tne ai.; glove it 05h51?? Velsc rg @elfe mpfeventmg the dlsturbmg of e' prevmus vided with an inverted T-shapedslot as at I2 in adlllstmentits upper finished surface I3 and aduplicate slot 40 With these and Other Objects in View, the in' I4 inthe lower finished surface I5. The head 40 vention consists of certainnovel features of conportion |5 of the inverted Tashaped slot |2 pro..struCtiOn, 21S Will be more fully described :and vides an undercut I1with overhanging portions n Particularly POiIl'ed 011i? in the appendedCia1m5- I8 which have finished edges along the narrower In theaccompanying drawing: or stem portion I9 of the T opening. Fig 1 iS aPerspective Vle-W ofthe dial test 1nd1- Upon the upper surface I3 of thebase a bush- 45 cator complete; ing 20 is slidably mounted with itsangelportion Fig. 2 is a central section through the Support- 2|engaging the upper finished surface I3 of the ing Standard 0nSubstantially line 2--2 of Figbase and with a tongue projection 22extending ure 1; into the slot I9 and engaging the opposite edges Fig. 3is a top plan view partially broken away 23 thereof, so that thisbushing will be guided in 50 and in section to show the connection ofthe its sliding movement by means of the opposite gage to its supportingarm; edges of this slot. A tubular standard 24 has a Fig.v 4 is afragmental detailed View showing the bore 25 tightly receiving the outersurface of the tongue at the lower end of the upright standard bushing,and at its lower end 26 engaging the n entering the slot in the base;iiange 2|. This standard being tubular isc'om- 55 paratively large indiameter and provides an enlarged engaging surface for a bracket 21which will presently be more fully described, and is also desirablylighter and stronger than a solid standard.

The upper end 28 of the tubular standard has a bore 29 receiving abushing 3U, which bushing provides an upper abutment surface 3i for thebottom of a hub 32 of the wheel or handle 33 secured on the 4upper endof the rod 34 by pin 35 so that the rod may be turned by the handle.This rod 34 extends downwardly through the standard and through a bore36 in the bushing 20, which bore is of a size larger than the slot I9and tongue 22. The rod at its lower end is reduced in diameter as at 31and threaded as at 38 to engage a nut 39 which is slidably received inthe wider portion of the inverted 'IT-shaped slot, and thus extendsbeneath the overhanging portions I8 of the base, so that as the rod 34is rotated by means of the handle 33, the nut 39 will be drawn uptightly against the under surface of the overhanging portion I8 and adownward thrust will be transmitted from the hub of the handle throughthe bushing 30 and tubular standard 24 to the flange 2| of the bushing20 to force the bushing snugly against the upper surface I3 of the base,and thus this standard will be bound firmly in adjusted position alongthe base.

By reason of the above construction, the entire superstructure iscarried by the bushing 20 which engages the surface I3 and even the rodand nut when the nut is loosened, is carried by this support so that theentire weight is supported upon the bushing, and by reason of thefinished engaging surface I3 and the under finished surface of thebushing this standard may be easily and evenly slid along. the base tothe desired adjusted position and there easily and quickly clamped byreason of the handle 33 at the upper end of the standard.

'I'he bracket 21 shown in perspective in Figure 5 is split as at 40 withears 4I and 42 drilled as at 43 for the reception of a bolt 44 having ahead 45 suitably sunk into a recess 46 in one of the ears while thethreaded portion 41 projects beyond the other ear to receive the tubularnut 48 operated by means of a lever handle 49 for forcing the earstoward each other and contracting the opening 50 through the bracket forbinding it `upon the standard and holding it in adjusted positiontherealong. This bracket is provided with a disc-like extension 5Ihaving a finished face 52 with a pin 53 extending through opening 54 inthe center thereof. This pin is provided with a head 55 suitably sunkinto the back portion of the extension and pivotally mounted upon thepin I have provided a swivel member 56 having an opening 51 in thecenter of a disc-like portion 58 to receive the pin 53. The face of thisportion 58 has a finished surface 59 to engage the surface 52 and bebound snugly thereagainst by means of a nut 68 engaging threaded portion6I of the pin 53 and forcing this member so that the abutments 52 and 59snugly and firmly engage.

The swivelmember 56 is pro-vided with a sleeve portion 62 having a bore63 to receive the tubular arm 64 which provides a substantial engagingsurface and is held in adjusted position in the sleeve by means of a setscrew 65 threaded thru the boss 66 so that its end 61 will engage thesurface of the arm and apply suflicient pressure thereon to hold it inadjusted position. The head 68 may be knurled so as to be more easilyoperated by the thumb and finger.

At the outer end of the tubular arm 64 I have provided a member 69 whichts the bore 'I0 oi' this arm and is held therein by a pin 1I. 'I'hismember 69 is half cut away at one end 12 to receive along one of itssurfaces the projecting lug 13 fixed on the back of the gage 14. Thisportion 12 and the lug 13 are provided with registering openings thruwhich the bolt 15 extends with its threaded surface 15 projecting beyondthe lug and engaged by the 'nut 11 operated by handle 18 so thatadjustment of the gage may be had at the end of the arm.

It can be seen by the above that many adjustments may be had and thateach of these adjustments is secured individually and separately fromany of the other adjustments so that practically any position of thegage may be had to cause it to engage work, such for instance as mightbe required in checking the true running of a spindle or a cutter or theinside or outside running diameter of some rotative part. The device issimple and with regard to similar` devices heretofore manufactured, isstronger and more rigid, although its superstructure parts weigh less.Its operating parts are more accessible and by reason of the provisionof increased bearing surfaces tighter and firmer clamping action may behad, and adjustments may be more smoothly and easily effected forobtaining greater accuracy and speed in setting the device foroperation.l

The foregoing description is directed solely towards the constructionillustrated, but I desire it to be understood that I reserve theprivilege of resorting to all the mechanical changes to which the deviceis susceptible, the invention being defined and limited only by theterms of the appended claims.

I claim:

1. In a dial test indicator, a base having a finished upper surface anda slot opening into said surface, a bushing having a flange slidable onsaid surface with a depending portion entering said slot andengaging theopposite sides thereof to guide said bushing and prevent rotationthereof, a tubular standard embracing said bushing and extendingupwardly from said flange, and means for clamping said bushing to saidsurface and the standard to said bushing.

2. In a dial test indicator, a base having a finished upper surface witha slot therein, a bushing having a flange slidably engaging said surfaceand provided with a tongue projection extending into said slot andengaging the edges thereof to guide the bushing in its sliding movement,a tubular standard embracing said bushing and resting on said flange andextending upwardly therefrom, and means operable at the upper end ofsaid standard for clamping it in adjusted position on said base to drawthe bushing in engagement with said surface.

3. In a dial test indicator, a base having a finished upper surface withan inverted T-shaped slot therein providing undercut portions andopening into said surface, a bushing having a flange slidably engagingsaid surface and provided with a depending projection extending intosaid slot and engaging the edges thereof to guide the bushing in itsmovement, a tubular standard embracing said bushing and resting on saidflange and extending upwardly therefrom, a nut in the undercut portionsof said slot, and movable means extending through said standard andengaging the nut for drawing said nut up and the bushing down intoengagement with said surface to clamp said standard in adjusted positionon said base.

4. In a dial test indicator, a base having a finished upper surface withan inverted T-shaped slot therein providing undercut portions andopening into said surface, a bushing having a iiange slidably engagingsaid surface and provided with a tongue projection extending into saidslot and engaging the edges thereof to guide the bushing in itsmovement, a tubular standard embracing said bushing and resting on saidange and extending upwardly therefrom, a nut in the undercut portions ofsaid slot, and means including a rotatable rod extending through saidstandard and operable at the upper end thereof engaging said nut fordrawing it up and the bushing down into engagement with said surface toclamp said standard in adjusted position.

5. In a dial test indicator, a base having a finished upper surface withan inverted T-shaped slot therein providing undercut portions andopening into said surface, a bushing having a ange slidably engagingsaid surface and provided with a bottom finished surface and aprojection thereon extending into said slot and engaging the edgesthereof to guide the bushing in its movement, a tubular standardembracing said bushing and resting on said flange and extending upwardlytherefrom, a nut in the undercut portions of said slot, and a rotatablerod extending through said standard, a handle at the upper end having anabutting surface to engage the upper end of the standard for drawing thenut up and the bushing down into engagement with said surface to clampthe parts in adjusted position.

6. In a dial test indicator, a base, a tubular standard, means forslidably and non-rotatably mounting said standard on said base, meansoperable at the top portion of said standard for clamping it in adjustedposition, a bracket embracing said standard, independent means on oneside of said bracket for securing it in adjusted position on saidstandard, a member swivelly mounted on said bracket provided with 5 asleeve, a gage supporting arm extending through said sleeve, meansprovided on the other side of the bracket for securing said swivelmember in adjusted position on said bracket and independent means on thesame side as the swivel securing 10 means for holding the arm inadjusted position in said sleeve.

7. In a dial test indicator, a base, a tubular standard, means forslidably and non-rotatably mounting said standard on said base, meansoper- 15 able at the top portion of said standard for clamping it inadjusted position, a split sleeve bracket embracing said standard, ascrew for contracting said bracket for securing it in adjusted positionthereon, a pin extending from said bracket threaded at one end, a memberpivotally mounted on said pin and provided with a sleeve, a gagesupporting arm slidable through said sleeve, a nut engaging the threadsof said pin for applying pressure on`said `member to force it againstsaid bracket and hold it in adjusted position, a set screw threadedthrough said sleeve to engage said arm to hold the arm in adjustedposition in said sleeve, and swivel connections at the end of saidslidable arm for adjustably supporting a gage thereto.

8. In a dial test indicator, a base having a finished upper surface, atubular standard, tongue and groove connections for slidably andnonrotatably mounting said standard on said surface of said base, andmeans acting through said standard and operable from the top of thestandard for clamping said standard in adjusted position on said baseand in engagement with said surface thereof.

40 JOHN W. PARKER.

